Matt Haig's A Boy Called Christmas (Canongate), illustrated by Chris Mould, is set in 18th century Finland. Feast your eyes on some of the book's illustrations here.
Haig has described the book as an "origin story for Father Christmas".
The book follows an "ordinary human boy" called Nikolas.
Mould has illustrated more than 20 books.
In A Boy Called Christmas Nikolas runs away from home to find his father, who disappears after going on a quest to find proof of the elf kingdom.
Nikolas' journey sees him encounter elves, trolls, bears and more.
A Boy Called Christmas is released on 12th November.